Title: Cisco VPN Client for Windows 'StartServiceCtrlDispatche' Local Denial of Service Vulnerability
Severity: MODERATE
Description:
Cisco VPN Client for Windows is prone to a local denial-of-service vulnerability. Specifically, the issue occurs in the 'StartServiceCtrlDispatcher' function when the 'cvpnd.exe' binary is run as a console application.
A local attacker can exploit this issue to crash the 'cvpnd' service and terminate all active VPN sessions, resulting in denial-of-service conditions.
This issue affects versions prior to VPN Client 5.0.06.0100 for Windows.
Affected Products:
- Cisco VPN Client for Windows 4.6
- Cisco VPN Client for Windows 4.7
- Cisco VPN Client for Windows 4.7.00.0533
- Cisco VPN Client for Windows 4.8.00
- Cisco VPN Client for Windows 4.8.01
- Cisco VPN Client for Windows 4.8.02
- Cisco VPN Client for Windows 4.8.02.0010
- Cisco VPN Client for Windows 5.0.01
References:
- Cisco: Cisco VPN Client Improper StartServiceCtrlDispatcher Behavior
- Cisco Systems: VPN Client
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